Electron-impact emission cross sections of Ar
Electron-impact emission cross sections of Ar
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DOI：
10.1088/0953-4075/29/9/022
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发表时间：
1996-05
期刊：
影响因子：
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通讯作者：
S. Tsurubuchi;T. Miyazaki;K. Motohashi
中科院分区：
文献类型：
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作者：
S. Tsurubuchi;T. Miyazaki;K. Motohashi
电子碰撞发射截面的Ar测量，和过渡从阈值到1000 eV的极化自由的方法。两种不同的方法被用来确定第一共振线的绝对发射截面。第一种方法是通过检测可见光到近红外辐射来测量4s态的级联截面，然后将总级联截面与4s态的能级激发截面结合起来，给出共振线的发射截面。第二种方法是测量装置的真空紫外灵敏度，通过比较共振线的光谱强度与电子碰撞产生的莱曼辐射的光谱强度，得到共振线的绝对发射截面。在实验误差范围内，两个结果显示出良好的一致性。通过从相应的发射截面中减去到这些能级的总级联截面，得到到和态的能级激发截面。
Electron impact emission cross sections of Ar were measured for the , and transitions from the threshold to 1000 eV by a polarization-free method. Two different methods were used in determining absolute emission cross sections for the first resonance lines. The first method is to measure the cascade cross sections to the 4s state by detecting visible to near-infrared radiation and the total cascade cross section was then combined with the level excitation cross section to the 4s state to give the emission cross section for the resonance line. The second method is to measure the vacuum ultraviolet sensitivity of the apparatus and an absolute emission cross section for the resonance line was obtained by comparing its spectral intensity with that of the Lyman- radiation produced from by electron impact. The two results showed good agreement within the experimental errors. The level excitation cross sections to the and states were obtained by subtracting the total cascade cross section to these levels from the corresponding emission cross sections.